Pre-folded medical self sealing pouch with a pressing mark

ABSTRACT

A pre-folded medical self sealing pouch closes accurately with a concave pressing mark formed between two counter rotating cams. A top cam has an annular protrusion mating with an annular recess on the lower cam. The medical self sealing pouch comprises a bag body which is formed by heat-sealing a first surface layer and a second surface layer, wherein a seal lip on the second surface layer extends outwards from the bag mouth of the bag body; and at least one adhesive layer is provided on the surface of the seal lip directing at the first surface layer, separated with the mouth of the bag body. The folding pressing mark is close to one edge of the adhesive close to the mouth of the bag body so that the adhesive is pasted to the first and second surface layers after the seal lip is folded along the folding pressing mark.

TECHNICAL FIELD

The present invention relates to a sterilized packing material used in medical institutions, especially to a medial self sealing pouch.

BACKGROUND OF THE INVENTION

Large parts of product in medical institutes are sterilized when packed in single paper plastic package instead of original wrapping cloth. The paper plastic package comprises a transparent plastic film and a medical grade paper; as the paper plastic package has good visibility and strong resistance of bacteria, the validity period of the package is greatly lengthened, and therefore it becomes very popular among the users.

However, ordinary paper plastic bag shall be heat-sealed with a sealing machine after it is packed. In this way, on the one hand, a sealing machine is required; on the other hand, a skilled sealing operator is also required. As a result, it is tedious to use this ordinary paper plastic bag compared with wrapping cloth package. For this reason, a medical self sealing pouch is invented to replace this paper plastic bag.

The medical self sealing pouch provides a seal lip which is similar to an envelope seal to an ordinary paper plastic bag. A dedicated double-faced adhesive tape is pasted to the seal lip. When the bag is used, the release paper on the double-faced adhesive tape shall be removed. And then, fold it to stick one second of the double-faced adhesive tape in width to the surface of the plastic film and stick the remaining double-faced adhesive tape to the surface of the medical grade paper to stick the bag mouth.

However, when this traditional medical self sealing pouch is used, especially when the envelope seal is pasted with a double-faced adhesive tape, there exists a problem of improper folding position and poor firmness after the stickup, which brings a risk of air leakage or bursting due to improper sealing during the sterilization process.

SUMMARY OF THE INVENTION

In order to solve the existing technical problems, this invention aims at providing a pre-folded medical self sealing pouch with a pressing mark to accurately continuously and effectively seal the bag mouth.

This invention model describes a pre-folded medical self sealing pouch with a pressing mark, which comprises;

a bag body which is formed by heat-sealing a first surface layer and a second surface layer, wherein a seal lip on the second surface layer extends outwards from the bag mouth of the bag body; and

a double-faced adhesive tape which is provided on the surface of the seal lip directing at the first surface layer, separated with the mouth of the bag body;

wherein the surface of the double-faced adhesive tape directing at the first surface layer is provided with a folding pressing mark and the folding pressing mark is close to one edge of the double-faced adhesive tape which is close to the mouth of the bag body so that half part of the double-faced adhesive tape in width is pasted to the first surface layer and other half part of the double-faced adhesive tape in width is pasted to the second surface layer after the seal lip is folded along the folding pressing mark.

In the above mentioned medial self sealing pouch, the distance between the folding pressing mark and the edge of the double-faced adhesive tape is about 2 mm.

In the above mentioned medical self sealing pouch, the first surface layer is a transparent plastic composite film.

In the above mentioned medical self sealing pouch, the second surface layer is medical grade paper.

In the above mentioned medical self sealing pouch, the double-faced adhesive tape comprises a tape body, stickup layers provided on two opposite surfaces of the tape body and release paper covering on one of the stickup layer, wherein another stickup layer is pasted on the seal lip.

As the above mentioned technical solution is adopted, a folding pressing mark is provided at a specific position of the double-faced adhesive tape on the seal lip in this invention. In this way, the seal lip provides a positioning function when the seal lip is folded. At the moment when the seal lip is folded along the folding pressing mark, the bag mouth can be accurately sealed with the double-faced adhesive tape as per the specified requirements to make sure that the sealing is continuous and effective. Moreover, the sealing effect is better and firmer so that there are less exploded bags.

In a preferred embodiment, the folding pressing mark forming the pre-folded medical self sealing pouch has an improvement in making the pre-fold impression line (whereby the self sealing pouch is already partially folded) by advancing the self sealing pouch material between the two counter-rotating cam rods. The top rotating cam rod has a protruding annular ring with a circumference protrusion which mates against the second surface layer of the pouch material, squeezing it down into the concavity formed by the annular recess indented into the lower rotating cam rod to form the tiny concave linear depression. That linear pressing mark gives the pre-fold pouch flap sufficient stiffness to stay obliquely upward pivotable along small concave linearly extending pressing market indentation. After the concave pressing mark indentation is formed, formed flap is pushed and lightly pivoted, whereby it has an innate ability to stay partially folded obliquely in a pre-folded configuration.

In an alternate embodiment, instead of a double-faced adhesive tape, the inside portion of the flap is covered with a single surface layer of adhesive, which is then covered with a removable release liner layer. Upon removal of the release liner layer, by peeling the release liner off of the inside surface of the flap, the pre-folded flap is manually or mechanically pivoted from its springy, pre-folded configuration, extending at an angle off of the rear paper layer of the self sealing pouch material, until the flap fully covers the opening of the pouch at the top mouth opening formed by the top of the front transparent pouch and the rear paper back layer of the self sealing pouch. The single adhesive layer extends from the top of the flap down to the bottom portion of the flap adjacent to the pre-folded pressing mark. The pre-folded pressing mark is the small concave indentation in the front facing portion of the rear paper layer and its concave linearly extending indentation provides the springy pivot line of the pre-folded flap.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a top view of a medical self sealing pouch in this invention;

FIG. 2 is a section view of a medical self sealing pouch in this invention;

FIG. 3 is a top view of a medical self sealing pouch under a pre-folded status in this invention;

FIG. 4 is a section view of a medical self sealing pouch under a pre-folded status in this invention.

FIG. 5 is a perspective diagrammatic view of the method of forming the linearly extending concave indentation of the medical pre-folded self sealing pouch between a pair of counter rotating cam rods, where the top cam has an annular circumferential protrusion and the linear cam has an annular indented recess.

FIG. 6 is a local enlarged, elevation view of the pinch action of the cams impinging on the pouch to form the pressing mark indentation, about which the pre-fold pouch flap pivots, taken along view line circle “6” of FIG. 5. FIG. 6A is a close-up detail side view of the mouth and flap portion of the pre-fold self sealing pouch, after the initial pinching of the pre-fold pressing mark has occurred, after being squeezed between the top and lower counter rotating cam rods shown in FIG. 5, and where the pre-fold flap has a single adhesive layer covered by a peel-off release linear layer.

FIG. 7 is a local perspective view of the end flap, shown in a closed position.

FIG. 8 is a local perspective view of the end flap, but showing the flap in angled condition, approximately opened to an angle, wherein the adhesive release liner paper strip is shown partially pulled to reveal the adhesive extending adjacent to the fold pressing mark line, where the pre-fold flap lip and pouch of this alternate embodiment are shown under a pre-folded status in this invention

DETAILED DESCRIPTION OF THE EMBODIMENTS

Preferred embodiments of the present invention will now be described in detail with reference to the drawings.

As shown in drawings 1-4, the present invention, a medical self sealing pouch, comprises:

a bag body formed by first heat-sealing the first surface layer 1 and the second surface layer, wherein the first surface layer 1 is a transparent plastic composite film and the second surface layer 2 is medical grade paper, and a seal lip 3 is provided on the second surface layer 2, extending outwards from the mouth of the bag body; and

a double-faced adhesive tape 4 is provided on the surface of the seal lip 3 directing at the first surface layer 1, separated with the mouth of the bag body; the double-faced adhesive tape 4 further comprises: a tape body 41, stickup layers (not shown in the figures) provided on two opposite surfaces of the tape body and release paper 42 covering on one of the stickup layer, wherein another stickup layer is pasted on the seal lip 3.

In this invention, a folding pressing mark 5 is provided on the surface of the double-faced adhesive tape 4 directing at the first surface layer 1 (the folding pressing mark 5 pre-folds the seal lip 3). Moreover, the folding pressing mark is close to one edge of the double-faced adhesive tape which is adjacent to the mouth of bag body (in the present embodiment, the distance between the folding pressing mark 5 and the edge of the double-faced adhesive tape 4 is 2 mm) so that half part of the double-faced adhesive tape 4 in width is pasted to the first surface layer 1 and other half part of the double-faced adhesive tape in width is pasted to the second surface layer 2 after the seal lip 3 is folded along the folding pressing mark 5 (as shown in FIG. 4).

When this invention is sealed, the pouch is pre-folded along the seal lip 3 along the folding pressing mark and then removed from the release paper 42 of the double-faced adhesive tape 4, and finally pressed into the seal lip 3 on the bag body tightly. As the position of the folding pressing mark 5 is specified and at least part 6 of the double-faced adhesive tape 4 is folded, the bag mouth can be correctly sealed as per the specified requirements with the double-faced adhesive tape 4 on the seal lip 3 and the stickiness is increased.

As shown in FIG. 5, the linearly extending pressing mark 25, about which the flap 24 pivots, is formed by inserting the self sealing pouch material between two counter rotating rods 10, 11, which are counter rotating “cams”. The top counter rotating rod cam includes an annular protrusion ring 12 and the lower rotating rod 11 includes a concave annular recess 13. When the self sealing pouch material 1, 2 is inserted between the closely located top and lower counter rotating cam rods 10, 11, the second pouch material layer 2 is squeezed to form the concave pressing mark 25 for the pre-fold, similar to the pre-fold pressing mark 5 shown in FIGS. 1 and 2 whereby pressure is applied against the self sealing pouch material second layer 2. Depending on the material thickness of layer 2, and because of different types of materials used, the pressure exerted by the annular protrusion ring 12 varies. To avoid undesirable cracks in the fragile paper back second layer 2 of the pre-fold pouch, the protruding annular ring 12 and the concave recess 13 have to be smoothed and blunted. After the pre-fold pressing mark 5 is formed, the seal lip flap is 24 pushed up into its pre-folded state by a machine pusher (not shown) using a rotating rod without any cams.

As shown in FIGS. 6-8, instead of double adhesive tape 4, an adhesive single layer 27 of seal lip flap 24 is covered by a removable release liner 22. FIG. 6 shows the pinch action of the annular protrusion 12 and concave recess 13 of counter rotating cams 10, 11 of FIG. 5 impinging on the pouch second layer 2 , to form a concave pressing mark indentation 25, about which the pre-fold pouch flap 24 pivots.

FIG. 6A shows the mouth and flap portion 24 of the pre-fold self sealing pouch, after the initial pinching of the pre-fold pressing mark 25 has occurred, such as after the second layer 2 has been pressed and squeezed between the top and lower counter rotating cam rods 10, 11 shown in FIG. 5, and where the pre-fold flap 24 has a single adhesive layer 27 covered by a peel-off release linear layer 22.

FIG. 7 shows the end lip flap 24, shown in a closed position of the pouch first and second layers 1, 2.

FIG. 8 shows the flap 24 in angled condition, approximately opened to an angle, wherein the adhesive release liner paper strip is shown partially pulled to reveal the adhesive 27 to the fold line, and, where the flap 24 and pouch 1, 2 of this alternate embodiment are shown under a pre-folded status in this configuration.

Also in the alternate embodiment of FIGS. 6-8, instead of the pouch of FIGS. 2 and 4, in the pre-fold self sealing pouch of FIGS. 6-8 the flap 24 folds and pivots right up from the concave pressing mark 25 fold line. In contrast, in the first embodiment shown in FIG. 4, a tiny portion “6” of the adhesive layer is folded back against itself. But in the alternate embodiment of FIGS. 6-8, the pre-fold line is at the edge of the adhesive layer 27, not partially in the adhesive layer of the flap, as in the first embodiment of FIGS. 1-4. However, the concave pressing mark 5 can be formed by the same actions depicted in drawing FIG. 5.

The alternate embodiments of FIGS. 6-8 of the present invention will now be described in detail with reference to the drawings.

As shown in drawings 6-8, in the alternate embodiment, the medical self sealing pouch comprises:

a bag body formed by heat-sealing the first surface layer and the second surface layer, wherein the first surface layer 1 is a transparent plastic composite film and the second surface layer 2 is medical grade paper, and a seal lip flap 24 is provided on the second surface layer 2, extending outwards form the mouth of the bag body; and

a single adhesive layer 27 is provided on the surface of the seal lip flap 24 directing at the first layer 1, separated with the mouth of the bag body; the single adhesive layer 27 further comprises a release liner 22 provided on one surface of the seal lip flap 24covering the adhesive layer 27.

In this alternate embodiment of FIGS. 6-8, a folding pressing mark 25 is provided adjacent to the single adhesive tape 27 directing at the first surface layer 1 (the folding pressing mark 25 pre-folds the seal lip flap 24). Moreover, the folding pressing mark 25 is close to one edge of the double-faced adhesive tape which is adjacent to the mouth of bag body, so that the single adhesive layer 27 in width is pasted to the first surface layer 1 and other half part of the double-faced adhesive tape in width is pasted to the second surface layer 2 after the seal lip 3 and is folded along the folding pressing mark 25 (as shown in FIG. 8).

When this pouch of FIGS. 6-8 is sealed, the pre-folded seal lip flap 24 folds partially upward along the folding pressing mark 25 and is pressed down after removal of the release paper of the single adhesive layer 27 and finally the user presses the seal lip flap 24 on the bag body tightly. As the position of the folding pressing mark 25 is specified and single adhesive layer flap 24 is folded, the bag mouth can be correctly sealed as per the specified requirements with the single adhesive layer 27 on the seal lip flap 24 and the stickiness is increased.

It is further noted that in the above mentioned medical self sealing pouch, the first surface layer is a transparent plastic composite film, known to those skilled in the art of sterile medical pouches.

It is further noted that in the above mentioned medical self sealing pouch, the second surface layer is medical grade paper, or a medical grade combination of paper pulp and plastic fibers, as known to those skilled in the art of sterile medical pouches.

In conclusion, the invention has the following advantages:

(1) The seal is smooth and beautiful; the sealing appearance will not be affected as the sealing position is inappropriate due to improper folding position;

(2) The sealing position is specified, safe and reliable. As part of the double-faced adhesive tape is also folded, the firmness of the seal is therefore enhanced; there will be no risk of air leakage or exploded bag due to improper sealing during the sterilization process;

(3) The bag mouth can be sealed more conveniently and quickly: the bag mouth can be sealed easily by removing the anti-adhesive tape on the double-faced adhesive tape and fold it along the folding pressing mark.

(4) In the alternate embodiment where a single adhesive layer is used, the sealing position is also reliable, because of the accurate formation of the linear concave pressing mark indentation, about which the lip flap pivots, between the counter rotating upper rod cam with a circumferential annular protrusion pushing down the pouch sealing material into the annular recess of the counter rotating lower rod cam,

To sum up, as a preferred unbodiment of this invention, it is not aimed to restrict the scope of this invention. There might be many variations from the above mentioned embodiment of the invention. Any simple and equivalent change and modification as per the claims and content of the description of this invention all fall to the protection scope for the claims of the invention. Content that is not described in detail in this invention is conventional technology. 

What is claimed is:
 1. A medical self sealing pouch, comprising: a bag body formed by heat-sealing a first surface layer and a second surface layer, wherein a seal lip on the second surface layer extends outwards from the bag mouth of the bag body; and a double-faced adhesive tape which is provided on the surface of the seal lip directing at the first surface layer, separated with the mouth of the bag body; wherein the surface of the double-faced adhesive tape directing at the first surface layer is provided with a folding pressing mark and the folding pressing mark is close to one edge of the double-faced adhesive tape which is adjacent to the mouth of the bag body so that half part of the double-faced adhesive tape in width is pasted to the first surface layer and the other half part of the double-faced adhesive tape in width is pasted to the second surface layer after the seal lip is folded along the folding pressing mark.
 2. The medical self sealing pouch according to claim 1, wherein the distance between the folding pressing mark and the edge of the double-faced adhesive tape is about 2 mm.
 3. The medical self sealing pouch according to claim 1, wherein the first surface layer is made of a transparent plastic composite film.
 4. The medical self sealing pouch according to claim 1 or 3, wherein the second surface layer is made of medical grade paper.
 5. The medical self sealing pouch according to claim 1, wherein the double-faced adhesive tape comprises a tape body, stickup layers provided on two opposite surfaces of the tape body and release paper covering on one of the stickup layer, wherein another stickup layer is pasted on the seal lip.
 6. The medical self sealing pouch as in claim 1, wherein said pre-fold pressing mark is a concave linearly extending indentation formed by inserting the self sealing pouch material between a pair of counter rotating cams, wherein a top cam has a rotating part extension with a circumferential protrusion pressing against said second layer of said self sealing pouch material and into the counter-rotating lower cam having an annular recess.
 7. A medical self sealing pouch, comprising: a bag body formed by heat-sealing a first surface layer and a second surface layer, wherein a seal lip on the second surface layer extends outwards from the bag mouth of the bag body; and a single adhesive layer which is provided on the surface of the seal lip flap directing at the first surface layer, separated with the mouth of the bag body; wherein the first surface layer is provided with a folding pressing mark and the folding pressing mark is adjacent to one edge of the single adhesive layer which is adjacent to the mouth of the bag body so that half part of the single adhesive layer in width is pasted to the first surface layer and the other half part of the single adhesive layer is pasted to the second surface layer after the seal lip is folded along the folding pressing mark.
 8. The medical self sealing pouch according to claim 7, wherein the first surface layer is made of a transparent plastic composite film.
 9. The medical self sealing pouch according to claim 8, wherein the second surface layer is made of medical grade paper.
 10. The medical self sealing pouch according to claim 7, wherein that the single adhesive tape comprises a tape body, a stickup layers provided on a surface of the tape body and a release paper liner covering on one inside surface of the seal lip flap.
 11. The medical self sealing pouch as in claim 7, wherein said pre-fold pressing mark is a concave linearly extending indentation formed by inserting the self sealing pouch material between a pair of counter rotating cams, wherein a top cam has a rotating part extension with a circumferential protrusion pressing against said second layer of said self sealing pouch material and into the counter-rotating lower cam having an annular recess..
 12. A method of making a pre-fold medical self sealing pouch with a pre-fold closure end, comprising the steps of : making a bag body formed by heat-sealing a first surface layer of a transparent plastic composite film and a second surface layer of medical grade paper, providing a seal lip on said second surface layer, said seal lip extending outwards from the bag mouth of the bag body; providing at least one adhesive layer on the surface of the seal lip flap directing at the first surface layer, separated with the mouth of the bag body; providing a folding pressing mark on the second surface layer adjacent to one edge of the single adhesive layer, which is adjacent to the mouth of the bag body so that half part of the single adhesive layer in width is pasted to the first surface layer and the other half part of the single adhesive layer is pasted to the second surface layer after the seal lip is folded along the folding pressing mark; wherein said pre-fold pressing mark is a concave linearly extending indentation formed by the steps of inserting the self sealing pouch material between a pair of counter rotating cams, wherein a top cam has a rotating part extension with a circumferential protrusion pressing against said second layer of said self sealing pouch material and into the counter-rotating lower cam having an annular recess to form said concave folding pressing mark.
 13. The method as in claim 12 further comprising the step of providing a second adhesive layer opposite to the first adhesive layer, and contacting said first adhesive layer with said second adhesive layer, when said seal lip closes to seal said pre-fold closure end of said pre-fold self sealing pouch.
 14. A pre-fold medical self sealing pouch formed by the process of the claim
 12. 